RFguy Posted March 30, 2023 Share Posted March 30, 2023 Looking good skip. that would be my approach. you still get some cylinder cooling this way. Who made your radiators- I was looking to do that on the Jabiru but cost of two custom radiators was quite high. what is the cylinder at the bottom ? oil -water heat exchanger ? or cabin heater ? the formula for inches of water pressure can be simplified to (airspeed knots * airspeed knots) / 1600 Link to comment Share on other sites More sharing options...
skippydiesel Posted March 31, 2023 Author Share Posted March 31, 2023 (edited) Have contacted no less than x 8 Australian custom radiator builder/makers - so far, one flat refusal (they asked straight up was it an aircraft application ? and sighted insurance concerns), one regretful refusal (doesn't deal in such small systems) with a referral - living in hope. "what is the cylinder at the bottom ? oil -water heat exchanger ? or cabin heater ?" - oil filter 😁 Edited March 31, 2023 by skippydiesel Link to comment Share on other sites More sharing options...
facthunter Posted March 31, 2023 Share Posted March 31, 2023 Look under Heat exchangers and don't mention aircraft. A lot of these concerns deal in large numbers , are Chinese and the quality is excellent. Nev Link to comment Share on other sites More sharing options...
Thruster88 Posted March 31, 2023 Share Posted March 31, 2023 Perhaps go to a motorcycle wrecker and see if they have the size you require. Inlet/ outlets could be changed to suit by a competent tig welder. 2 1 1 Link to comment Share on other sites More sharing options...
RFguy Posted March 31, 2023 Share Posted March 31, 2023 tell them hovercraft. I've found the Ninja 250 radiator is a good size for a 'tax, has conveniently located pipes - a good one (19mm). you want 25mm for the 'tax I presume. $100 at various local sellers. If you are pressed for frontal area, consider a triple core. You'll have plenty of pressure to drive it. 1 Link to comment Share on other sites More sharing options...
skippydiesel Posted April 1, 2023 Author Share Posted April 1, 2023 Problemo! - The few installations I have seen with the double/forward coolant radiators, have been aftermarket fuel injected 912 variants - mechanical fuel pump is redundant/deleted. I will not be removing my fuel pump any time soon - this pretty much makes what I saw as being quite a straightforward installation way more complicated on the right side of the gearbox. - Such is life & homebuilt aircraft! 1 Link to comment Share on other sites More sharing options...
Thruster88 Posted April 1, 2023 Share Posted April 1, 2023 The cooling system sounds like it just needs a little more capacity if you have been able to climb to 6500. Could you duct cool air to the radiator in it's current location? Electric fans as required? Link to comment Share on other sites More sharing options...
skippydiesel Posted April 1, 2023 Author Share Posted April 1, 2023 6 hours ago, Thruster88 said: The cooling system sounds like it just needs a little more capacity if you have been able to climb to 6500. Could you duct cool air to the radiator in it's current location? Electric fans as required? Got one - it helps a little when on ground. I don't like the added complexity/weight of a little fan, when I have a bigger one out front, that should be sufficient , if the cooling system is well designed. 1 Link to comment Share on other sites More sharing options...
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